Cheapest return flights from Chicago to Sofia in May from 624€

AirHint found the following cheapest return flights from Chicago (ORD) to Sofia (SOF) in May 2026 (see full year).

Return flights

06 May - 25 May Icelandair
07 May - 14 May Icelandair
12 May - 10 Jun Lufthansa
13 May - 27 May United
13 May - 10 Jun United
08 May - 15 May Icelandair
14 May - 28 May Spirit Airlines
14 May - 11 Jun Lufthansa
16 May - 30 May Spirit Airlines
25 May - 09 Jun Icelandair
25 May - 19 Jun Lufthansa

Also check the deals for one-way flights from Chicago to Sofia in May.

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